The Rupee rally to a nearly three-week high faces a test from higher U.S. Treasury yields on Thursday after the Federal Reserve's policy decision while volatile oil prices remain a key risk. The currency has rallied for four straight sessions, rising over 1%, with traders attributing much of the move ?to sustained support from the Reserve Bank of India. The central bank sold ?dollars aggressively on Friday when the rupee was at risk of ?slipping to an all-time low. Since then, it has intervened on each trading ?day, although the scale of intervention has moderated, according to traders. What the RBI is ?doing is "making it clear early" in the day that it will be present in the market, and that tends to set the tone for the rupee, a currency trader at a bank ?said. U.S. 30-year Treasury yields hovered near their highest level in almost ?two decades with investors questioning the Fed's resolve to bring inflation under control, prompting demand for ?higher ?compensation against inflation risks. The selloff followed the Fed's decision to keep interest rates unchanged amid three dissents in favour of a rate hike. Fed Chair Kevin Warsh reiterated the central bank's commitment to containing inflation while stopping short of signalling what policy ?actions might be ?required. The U.S. carried out fresh strikes in Iran ?on ?Wednesday, according to the U.S. military, further escalating ?a months-long conflict and keeping upside risks to oil prices firmly in focus. Brent crude surged nearly 8% on Wednesday ?before pulling back slightly in Asian trading. The U.S. dollar found its footing at the start of Asian trading on Thursday after the Federal Reserve kept its policy interest ?rate on hold and Chair Kevin Warsh left markets guessing about how divisions ?on its rate-setting committee would resolve. The dollar index , which measures the greenback's strength against six currencies, nudged up 0.1% to 100.89 after the U.S. said it was conducting air strikes in Iran. The British pound ?was 0.1% weaker at $1.3355 ahead of a BOE interest rate decision ?on Thursday, with market participants expecting no change. The euro slid 0.1% ?to $1.1457. The Australian dollar was steady along with its New Zealand counterpart at $0.6959 and $0.5795 ?respectively, while the yen was level at 163.455 yen per U.S. dollar. Oil prices gave up some of their gains on Thursday as oil tankers continued to make their way out of the Middle East even as tensions there escalated, with ?the U.S.-Iran war spreading beyond its main fronts. Brent futures fell $1.29, or 1.42%, to $89.45 a ?barrel as of 0110 GMT. U.S. West Texas Intermediate (WTI) crude fell 56 cents, or 0.66%, to $83.90 a barrel. Brent settled up 7.91% in the previous session and WTI up 6.56% in one of the sharpest spikes of the Iran war, reversing ?a 5% plunge on Tuesday after a pause in hostilities in the five-month conflict.......